122 J. Zhang, H. Dong & L. Liu
all these objective design data, designers generate relevant data for their own use
as reference of the objective design data; these data can be identified as derived
data. Data sources like web-based resources, designer’s experiences, inspiration
and imagination are included in this type of data.
The use of the style guideline book was prevailing during a power tool design
process. One designer regarded the style guideline book as a source of aesthetic phi-
losophy for industrial designers; another designer thought it was a genetic blueprint
for keeping power tool design into a family look. As to achieve a unified visual
language, the style guideline book provides almost all the detailed design elements
which will determine ...